asm-generic: Drop getrlimit and setrlimit syscalls from default list

The newer prlimit64 syscall provides all the functionality of getrlimit
and setrlimit syscalls and adds the pid of target process, so future
architectures won't need to include getrlimit and setrlimit.

Therefore drop getrlimit and setrlimit syscalls from the generic syscall
list unless __ARCH_WANT_SET_GET_RLIMIT is defined by the architecture's
unistd.h prior to including asm-generic/unistd.h, and adjust all
architectures using the generic syscall list to define it so that no
in-tree architectures are affected.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-hexagon@vger.kernel.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Salter <msalter@redhat.com> [c6x]
Acked-by: James Hogan <james.hogan@imgtec.com> [metag]
Acked-by: Ley Foon Tan <lftan@altera.com> [nios2]
Acked-by: Stafford Horne <shorne@gmail.com> [openrisc]
Acked-by: Will Deacon <will.deacon@arm.com> [arm64]
Acked-by: Vineet Gupta <vgupta@synopsys.com> #arch/arc bits
Signed-off-by: Yury Norov <ynorov@marvell.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arc/include/uapi/asm/unistd.h

@@ -18,6 +18,7 @@
 
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
 #define __ARCH_WANT_SYS_EXECVE
 #define __ARCH_WANT_SYS_CLONE
 #define __ARCH_WANT_SYS_VFORK

arch/arm64/include/uapi/asm/unistd.h

@@ -17,5 +17,6 @@
 
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_NEW_STAT
+#define __ARCH_WANT_SET_GET_RLIMIT
 
 #include <asm-generic/unistd.h>

arch/c6x/include/uapi/asm/unistd.h

@@ -17,6 +17,7 @@
 
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
 #define __ARCH_WANT_SYS_CLONE
 
 /* Use the standard ABI for syscalls. */

arch/csky/include/uapi/asm/unistd.h

@@ -2,6 +2,7 @@
 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
 
 #define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SET_GET_RLIMIT
 #include <asm-generic/unistd.h>
 
 #define __NR_set_thread_area	(__NR_arch_specific_syscall + 0)

arch/h8300/include/uapi/asm/unistd.h

@@ -2,5 +2,6 @@
 
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
 
 #include <asm-generic/unistd.h>

arch/hexagon/include/uapi/asm/unistd.h

@@ -30,6 +30,7 @@
 #define sys_mmap2 sys_mmap_pgoff
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
 #define __ARCH_WANT_SYS_EXECVE
 #define __ARCH_WANT_SYS_CLONE
 #define __ARCH_WANT_SYS_VFORK

arch/nds32/include/uapi/asm/unistd.h

@@ -3,6 +3,7 @@
 
 #define __ARCH_WANT_STAT64
 #define __ARCH_WANT_SYNC_FILE_RANGE2
+#define __ARCH_WANT_SET_GET_RLIMIT
 
 /* Use the standard ABI for syscalls */
 #include <asm-generic/unistd.h>

arch/nios2/include/uapi/asm/unistd.h

@@ -20,6 +20,7 @@
 
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
 
 /* Use the standard ABI for syscalls */
 #include <asm-generic/unistd.h>

arch/openrisc/include/uapi/asm/unistd.h

@@ -21,6 +21,7 @@
 
 #define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
 #define __ARCH_WANT_SYS_FORK
 #define __ARCH_WANT_SYS_CLONE
 

arch/riscv/include/uapi/asm/unistd.h

@@ -18,6 +18,7 @@
 #ifdef __LP64__
 #define __ARCH_WANT_NEW_STAT
 #endif /* __LP64__ */
+#define __ARCH_WANT_SET_GET_RLIMIT
 
 #include <asm-generic/unistd.h>
 

arch/unicore32/include/uapi/asm/unistd.h

@@ -12,6 +12,7 @@
  */
 
 #define __ARCH_WANT_RENAMEAT
+#define __ARCH_WANT_SET_GET_RLIMIT
 
 /* Use the standard ABI for syscalls. */
 #include <asm-generic/unistd.h>

include/uapi/asm-generic/unistd.h

@@ -467,10 +467,15 @@ __SYSCALL(__NR_uname, sys_newuname)
 __SYSCALL(__NR_sethostname, sys_sethostname)
 #define __NR_setdomainname 162
 __SYSCALL(__NR_setdomainname, sys_setdomainname)
+
+#ifdef __ARCH_WANT_SET_GET_RLIMIT
+/* getrlimit and setrlimit are superseded with prlimit64 */
 #define __NR_getrlimit 163
 __SC_COMP(__NR_getrlimit, sys_getrlimit, compat_sys_getrlimit)
 #define __NR_setrlimit 164
 __SC_COMP(__NR_setrlimit, sys_setrlimit, compat_sys_setrlimit)
+#endif
+
 #define __NR_getrusage 165
 __SC_COMP(__NR_getrusage, sys_getrusage, compat_sys_getrusage)
 #define __NR_umask 166

scripts/checksyscalls.sh

@@ -38,6 +38,11 @@ cat << EOF
 #define __IGNORE_lstat64	/* fstatat64 */
 #endif
 
+#ifndef __ARCH_WANT_SET_GET_RLIMIT
+#define __IGNORE_getrlimit	/* getrlimit */
+#define __IGNORE_setrlimit	/* setrlimit */
+#endif
+
 /* Missing flags argument */
 #define __IGNORE_renameat	/* renameat2 */